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Afina-wow [57]
3 years ago
5

Please help, I'll mark brainlist

Mathematics
1 answer:
My name is Ann [436]3 years ago
5 0
7=x this is for the first one but you have to 1
3
=

2
1
1
3
=
x
21
31​=21x​
2
1
⋅
1
3
=
2
1
⋅

2
1
21
⋅
1
3
=
21
⋅
x
21
21⋅31​=21⋅21x​
Multiply the numbers
Cancel multiplied terms that are in the denominator
7
=
2
1
⋅

2
1
7
=
21
⋅
x
21
7=21⋅21x​
7
=

7
=
x
7=x
7
=

7
=
x
7=x

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g Disco Fever is randomly found in one half of one percent of the general population. Testing a swatch of clothing for the prese
Marizza181 [45]

Answer:

The probability that the result is positive is P=0.04475=4.475%.

Step-by-step explanation:

We have the events:

D: disease present

ND: disease not present

P: test positive

F: test false

Then, the information we have is:

P(D)=0.005

P(P | D)=0.99

P(P | ND)=0.04

The total amount of positive test are the sum of the positive when the disease is present and the false positives (positive tests when the disease is not present).

P(P)=P(P | D)*P(D)+P(P | ND)*(1-P(D))\\\\P(P)=0.99*0.005+0.04*0.995\\\\P(P)=0.00495+0.0398=0.04475

The probability that the result is positive is P=0.04475.

5 0
3 years ago
Bello you have a great day
natita [175]
You too !! .......... :)
4 0
2 years ago
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What is the order of operations to solve this problem?<br> 10 x 5 + 2 / 2 = 60
Slav-nsk [51]

Simply remember PEMDAS:

P = Parentheses

E = Exponents

M = Multiplication

D = Division

A = Addition

S = Subtraction

You perform these actions from left to right.

However in this case it is not possible for it to equal 60.

8 0
3 years ago
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The ratio of the sales tax to the amount of a purchase is a fixed number in Town Q. The table shows the sales tax for a purchase
Volgvan
I think number #29 is A but may be B and number #30 is C
8 0
3 years ago
Four points are always coplanar if check all that apply
Elza [17]
Hey there,

Your question states: <span>Four points are always coplanar if . . .

Your correct answer from the questions above would be </span>they lie in the same place 

The definition of the word \boxed{coplanar} means : In the same place.

So . .Four points are always coplanar if <span>they lie in the same place.

Hope this helps many.

~Jurgen</span>
5 0
3 years ago
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